Intermittent steam-boiler feed



Sept. 2, 1930. A. M. HUBBARD 1,774,598

INTERMITTENT STEAM BOILER FEED Filed Aug. 29. 1928 INVENTOR AMHLEBBA D-ATTORNEY Patented Sept. 2, 1930 unrrs sr'rss PATEr OFFICE v ADRA M.HUBBARD, 0F FORT 'WORTH, TEXAS, ASSIGNOR T 0 L. L. HENDERSON, OF

AI'IC HI-LOW STEAIVI PULSOMEIER COM- DALLAS, TEXAS, TRUSTEE FOR AUTOMPANY, 0F DALLAS, TEXAS Application filed August 29, 1928. Serial No.302,861.

My invention relates to feeding devices for steam boilers and moreparticularly to devices for feeding water intermittently to boilers; andthe object is to provide simple devices which will operate automaticallyfor feeding water intermittently to boilers when once started and toprovide an economical method of operating steam boilers to maintain anadequate supply of steam for the purposes required. Reference is had tothe accompanying drawings which form a part of this application. 7

Other objects and advantages will be fully explained in the followindescription and the invention will be more particularly pointed out inthe claims.

Fig. 1 is a diagrammatic view of the invention, partly in section.

Fig. 2 is a longitudinal section of the movable sleeve used in theoperation of the improved feed. 7

Fig. 3 is a side elevation of the piston.

Similar characters of reference are used to indicate the same partsthroughout the several views.

This invention includes a casing 1 in which a piston 3 moves. A reducer2 is screwed on one end. The casing 1 is connected to a water supplysource by a pipe 1- which is provided with a check valve 5. A T-pipe 6is connected to the reducer 2 and to the pipe 4; through the check valve5 casing. A movable sleeve 7 is mounted in the casing 1 and the piston 3is mounted in the sleeve 7. A pipe 8 leads to a boiler and is connectedto the T-pipe 6 through a check valve 9. A heating coil 10 is provided.The casing 1 has a boss 11 and the coil 10 has a valve 12 connectedthereto and the valve 12 is connected to the coil 10. The coil 10 isalso con nected to the casing l which has an L-eXtension 13 to which thecoil 10 is connected. The casing 1 has an exhaust opening let.

The devices herein described are for use where there is a waterpressure. The piston 3 and the sleeve 7 are automatically moved by thepressure of the water. The coil 10 is a heating coil and may belocatedin the furnace. When water is let in the easing 1 from the pipe 4, thepiston 33, if not already below the coil connection 11, will be I steamwill escape from the coil through the opening 13 into the sleeve 7 belowthe piston 3. If the water is sufiiciently heated, it will be heated andconverted into steam and overcome the pressure of water from the pipeand force the piston 3 above the discharge opening 11 and so stop theflow of water into coil 10. The sleeve 7 has a discharge opening 15.When the piston 3 passes above the opening 15, hot water and steam willescape through the opening 15 and the groove 16 in the casing 7 and thenout through the pipe 8 to the boiler. As soon as the force of the hotwater and steam become less than the water pressure coming through pipe4, the cold water will again press the piston 3 below the dischargeopening and pass through the openif there is excess of hot water andsteam pressure, the piston will be pressed against the upper part of thesleeve 7 and lift the sleeve 7 upwardly so that the excess pressure willescape as soon as the sleeve 7 comes into communication with the exhaustopening 14. Any pressure exceeding 30 pounds will opcrate the feedingdevices.

The lower end of the sleeve 7 constitutes a valve 17 for the purpose ofbleeding the expansion coil lfiafter the sleeve 7 passes to the top ofcasing 1 for reducing the pressure in coil 10 to atmospheric pressure.Immediately cold water will enter and force the piston and sleeve downand cold water will again enter the casing 1 and sleeve 7.

WVhat I claim, is,

1. An intermittent steam boiler feed comprising a casing, a sleevemovable longitudinally therein and having an intake opening forreceiving a supply of water, a T-pipe connected to said casing forsupplying water to said sleeve and for discharging hot water therefrom,a heating coil connected to said casing and adapted to communicate withsaid sleeve for receiving water therefrom and connected to said casingbelow said sleeve for discharging hot water into said casing and sleeve,and a piston movable in said sleeve by incoming water supply until thepiston opens communication with said coil and movable by hot water andsteam from said coil when the pressure from said coil becomes greaterthan the pressure of incoming cold water from the supply source to cut0d the cold water supply and to discharge hot water and steam from saidsleeve and casing to a boiler.

2. An intermittent steam boiler feed comprising a casing, a sleevemovable longitudinally therein and having communication with a supplysource of water and having communication with a boiler through saidcasing,

a heating coil having connection with said casing and communicating withsaid sleeve for receiving a supply of water to be heated and a secondconnection with said casing for discharging hot water and steam intosaid casing and sleeve, and a piston movable longitudinally in saidsleeve by a water supply coming into said sleeve until the piston passessaid heating coil connection and movable by hot water and steam fromsaid coil when the hot water pressure becomes greater than the coldwater supply for stopping the supply and for discharging hot water fromsaid sleeve and casing to a boiler.

3. An intermittent steam boiler feed comprising a casing havingcommunication with a supply source of water and communication with aboiler and having heating coil connections and an exhaust, a sleevemovable longitudinally in said casing and having an intake opening forreceiving a supply of cold water and having a discharge for cold waterto a heating coil and a discharge for hot water to said boiler and anintake for hot water from said heating coil, a heating coil having coldand hot water connections with said casing and sleeve, and a pistonmovable longitudinally in said sleeve by cold water supply until thepiston passes the cold water connection with said heating coil andmovable by iot water pressure from said coil when said pressure becomesgreater than the pressure of the cold water supply to stop the coldwater supply and to discharge hot water through said sleeve and casingto a boiler, and said sleeve serving as a valve to close said exhaustduring normal operations and said piston being adapted to move saidsleeve to open said exhaust in case of excessive pressure from saidheating coil.

In testimony whereof, I set my hand, this 27th day of June, 1928.

ADRA M. HUBBARD.

